@startuml
'https://plantuml.com/sequence-diagram

autonumber

title KCL Shard Syncing Initialization (Abridged)

participant Scheduler as S
participant LeaseCoordinator as LC
participant PeriodShardSyncManager as PSS
participant "Lease Table\n(DynamoDB)" as DDB

alt on initialization
  S->S: create PeriodicShardSyncManager(\n  ..., leaseRefresher, leasesRecoveryAuditorExecutionFrequencyMillis, ...)
  S->LC: initialize()
  opt if lease table does not exist
    LC->DDB: create lease table
  end
  S->PSS: start()
  PSS->PSS: schedule self every\n  leasesRecoveryAuditorExecutionFrequencyMillis
end

@enduml